This is the 3656th most frequent Spanish word.
negras
"Negras" means "black" (feminine plural) in English.
The word 'negras' is used as an adjective describing 'noches' (nights) to convey the color and ambiance.
Las noches son negras y misteriosas.
The nights are black and mysterious.
Here, 'negras' acts as a descriptive adjective, modifying 'chaquetas' (jackets) to indicate their color.
Ella prefiere las chaquetas negras sobre las azules.
She prefers black jackets over blue ones.
In this case, 'negras' metaphorically describes 'pensamientos' (thoughts), signaling a darker, somber mood or feeling.